Electric elevator.



No. 7|5,299. v Painied D8.'9, i902.

v H. RUWNTREE.

ELECTRIC ELEVATOB.

(Application led Nov. 29, 1899.)

(No Model.) 4 Sheets-Sheet l.

, www@ m: norms Prms co. Pnmaumo. wAsHmmon. n. c, v

No. 7|5,299. Patented nec. 9. |902.

H. nownrnse.

ELECTRIC ELEVATOB.

(Application ma Nov. 29, 189s.;

4 Shoots-Sheet 2.

TN: Nonms Prrnns cn, Pnofmumo., WASHINGTON. D. c.

No. 7|5,299. Patented Dec. 9, |902.

, H. RUWNTREE.

ELECTRIC ELEVATDR.

(Application led Nov. 29, 1899.)

4 Sheets-Sheet 3 (No Model.)

No. 7|5,4299. Patented Dec. 9, |902.

H. BOWNTREE.

ELECTRIC ELEVATOR.

(Application led Nov. 29! 1899.)

(No Modal.) 4 Sheds-Shout 4.

UNITED STATES PATENT OEEICE.

HAROLD ROWNTREE, OF CHICAGO, ILLINOIS, ASSIGNOR TO BURDETT- ROWNTREEMANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

ELE-ovale ELEVATOR.

SPECIFICATION forming partof Letters Patent No. 715,299, dated December9, 1902.

Application tiled November 29, 1899. Serial No. 738.746. (No model.)

To all whom t may concern.-

Be it known that I, HAROLD RowNTREE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Electric Elevators, of whichthe following is a specification.

This invention relates to electric elevators.

The object of the invention is to provide a push-button-control systemfor elevators whereby the movement of the car may be effected andcontrolled from any landing or from the car by means of push-buttons.

A further object of the invention is to provide means of simpleconstruction and arrangement whereby by merely manipulating an ordinarypush-button at any landing the car-hoisting mechanism will be set inmotion to move the car and will be arrested automatically only when thecar reaches the particular floorat which the push-button wasmanipulated.

A further object of the invention is to provide a control system whereinby manipulating any'one of a series of ordinary push-buttons arranged onthe car and corresponding to the various landings at which the car stopsthe hoisting mechanism will be putin action to move the car and will bearrested only when the car reaches the particular floor corresponding tothe particular push -button which has been manipulated.

A further object of the invention is the provision of means in apush-button-control system whereby the hoisting mechanism is renderedinoperative whenever a shaft orwell door is open at any landing orfloor.

A further object of the invention is the provision of means in apush-button-control system whereby when one push-button is manipulated,whether at any landing or on the car, to cause the car to move to aparticular landing or iioor the operation or manipulation of any otherpush-button will be ineffective until the cycle of operation set inmotion by the manipulation of the lirst push-button is completed.

Other objects of the invention will be morefully set forth hereinafter.

The invention consists, substantially,in the construction, combination,location, and arrangement, all as will be more fully hereinafter setforth, as shown in the accompanying drawings, and finally pointed out inthe appended claims.

Referring to the accompanying drawings, and to the various views andreference-signs appearing thereon, Figure l is a diagram showing thevarious motor and controlling circuits and switches. Fig. 2 is asimilarview showing the arrangement of the push-button circuits at the variouslandings and through the car. Fig. 3 is a broken detail view showing aform of automatic switch for controlling the various circuits. Fig. 4 isa broken detail view in section ou the line 4 4, Fig. 3. Fig. 5 is abroken detail view of a portion of the switch device shown in Figs. 3and 4. Fig. 6 is a detail View illustrating the coperative relation ofthe main and auxiliary switches. Fig. 7 is an enlarged detail view ofthe main motor-switches and the means for operating the same. Fig. 8 isan end view of the construction shown in Fig. 7. Fig. 9 is a detailsectional View on the line 9 9, Fig. 7. Fig. l0 is an enlarged detailview of the motor-brake mechanism. Fig. 11 is a detail view of thesafety-switch on the car. Fig. 12 is a similar View of a door-switchthrough which a circuit is completed when the door is closed and circuitis broken when the door is opened.

Referring to the drawings, A designates the car; B B B2, the doors ofthe elevator shaft or well at the various landings at which the car isto stop; C C C2, push-buttons, one located at each landing or floor, andD D D2 pushbuttons on the car corresponding, respectively, to thepush-buttons C C C2. A circuitclosure switch or device E E' E2 isarranged at each floor to be opened or closed by the opening or closingof the door at the same landing therewith. The Wall-switch is indicatedat W.

Reference-signs F F' F2 designate magnetswitches corresponding to thevarious doors or landings and the circuits of Whichlare controlled bythe respective and corresponding push-buttons on the car or at thelandings, as will be more fully explained hereinafter.

IOO

B3 designates a safety-switch on the car, the purpose and function ofwhich will be explained more fully hereinafter.

G G' G2 designate double switches for controlling the mainmotor-circuit, the double switch G2 controlling the main return-circuitand being actuated when either one of the other two double switches areactuated, and said switches G G', both of which cannot be actuated atthe same time, determining the direction of the current through themotor, one of said switches actuating the motor in one direction and theother actuating said motor in the opposite direction.

H H' are solenoids for actuating the switches G G', respectively. InFigs. 7, 8, and 9 are shown in detail the construction and arrangementof these double switches and a means for operating the same and wherein30 designates a shaft suitably journaled to rock in bearing-posts 3l.The arms of double switch G are connected to a sleeve 32, looselymounted on shaft 30. Similarly, the arms of double switch G' areconnected to a sleeve 33, also loosely mounted on said shaft, while thesleeve 34, which carries the arms of switch G2, is mounted and connectedto rotate with said shaft, as by means of pi-ns 35. Each of the sleeves32 and 33 is provided with an eX- tension or lug 36 37, respectively,and suitably connected to the shaft 30 is a pin or stud 38 39, said pinsor studs being respectively arranged in the path of said lugs oreXtensions 36 37. Connected to each of the sleeves 32 33 is a crank-arm40 4l, said arms being pivotally connected, respectively, to thearmatures of the solenoids H H'. From this construction it will bereadily seen that when the solenoid H is energized the sleeve 32 will berocked, thereby actuating the double switch G and also rocking shaft 30,through the engagement of lug 36 with pin 38, and with it the sleeve 34,which carries the double switch G2, but without actuating the doubleswitch G'. Similarly, when solenoid H' is energized the switches G' andG2 are actuated. A spring 42 may be arranged to oppose the rockingmovement of shaft 30 and operates to return said shaft and the doubleswitches to normal position when the solenoids H I-I are cut out ofcircuit.

Jis the motor-armature; J', the motor-field; J2, the commutator.

J3 is a brake-solenoid. The construction of the brake mechanism actuatedby said solenoid is shown more in detail in Fig. l0 and comprises armsor levers 43 44, pivotally mounted intermediate their ends. To one endof each is connected pieces 45 46, forming corepieces of the solenoidJ3. The other ends of said levers are arranged to embrace between themthe periphery of the brake-wheel 47, carried by the motor-shaft. Aspring 48 eX- erts its tension to apply the levers 43 44 with brakingeffect to the brake-wheel 47, and by energizing the solenoid the tensionof this spring is overcome and the brake is released.

J 4 is an automatic electric switch operated by the current passingthrough the switchsolenoids and in turn controlling the circuit of acontrolling device through which the motor field and armature currentsare controlled. This controlling device consists of a rheostat J5,through which the motor-armature current is increased or decreased, anda rheostat J, through which the motor-field current is increased ordecreased, these rheostats being so relatively arranged that when themotorarmature current is increased the field-current is decreased, andwhen the armaturecurrent is decreased the field-current is increased,thus effecting a speed regulation of the mo tor. The rheostats J5 J6 arecontrolled by an arm J7 and dash-pot J8, the said arm being operated bya solenoid J9 against the tension of a spring J10, the circuits of thesaid solenoid J9 being controlled, as above explained, by the automaticelectric-switch device J1. Each of the magnet-switches F F' F2 consistsof a magnet F'1 F10 F11 and an armature-lever F5, each armature-leverplaying between a pair of contacts F6 F7 and also arranged to makecontact with a contact-point F8, the action of the several magnets F4F10 F11 upon their respective armature-levers F5 being opposed by aspring F2. The circuits of the solenoids H H' are controlled by means ofa switch device, (indicated generally by reference-sign K.) Thiscomprises a shaft K', suitably journaled and driven from thehoisting-drum shaft K2 or other suitable or convenient rotating part ofthe apparatus in any suitable manner-as, for instance, through a wormK3, shaft K4, and driving-sprocket K5. The rotation thus impartedthrough worm K3 effects a partial rotation of an insulationdisk K6 and acam-wheel or track K7. Upon the insulation disk are mounted contactstrips or segments. These segments or strips are arranged in twoseparated sets, one set consisting of a long strip a and a short stripd' and the other set consisting of a long strip b and a short strip b',the two sets of strips being separated from each other. Supported uponthe lever K8 is a contact K9, arranged to coperate with thecontact-strips a a b' b. The lever K8 is pivotally supported at one endand at the other end is supported in position for the contact K9 to makeelectrical connection with the strips carried by disk K6 by means of aprojection K10, arranged to rest upon the edge of cam-disk K7. At asuitable point the periphery of said disk K7is recessed, as at K11, andwhen the projection K10 reaches recess K11 the supporting end of thelever K5 will be lowered by said projection dropping into said recess,thereby breaking circuit between the strips or segments and the contactK2. In order to enable the projection K1O to again ride up upon theperiphery of the camdisk, I provide the inclined ways K12on each side ofthe recess K11, said ways being covered by pivoted track-sections K13 ina wellknown manner.

IOO

IIO

Upon shaft K is supported a disk L10, of insulating material, upon whichare mounted the binding-posts or ot-her suitable contact or circuitcompleting means (indicated at h' e p p2) through which the circuits arecompleted from the strips or segments a ci b b.

It will be understood that the periphery of cam-disk K7 is provided withonlyonerecess K11, and this recess is arranged opposite or adjacent tothe space between the ends of the strips ct and b', and hence wheneverthe car arrives at its predetermined stoppingpoint the recess K11 willbe opposite the pin or projection K10 on lever K8 corresponding to thatfloor at which the car is to stop, and said disks K and K7 rotate in onedirection or the other, according as the car ascends or descends. Itwill also be understood and will be more fully explained hereinafterthat as the car approaches its stopping-point the contact-carrying diskK6 will move, so as to carry strip b or a, as the case may be, out ofcontact with the operative contact K9 and to bring strip a or Z2', asthe case may be, into contact therewith.

The specific mechanicalA construction of many of the parts abovereferred to is of no particular consequence so far as the presentinvention is concerned, and they are more fully shown and described inmy companion application filed on November 15, 1899, Serial No. 737,095,and hence are not shown herein, except diagrammatically,to illustratethe electrical action of my push-button system, which forms theessential feature of my present invention.

I will now describe the electrical action of the several devices abovereferred to and their mutual and coperative action and relation.

Suppose the parts to be in the relative positions shown and thepush-button C to be manipulated. Thereupon the following circuit will becompleted: from the main supply-wire d2 through wall-switch W, wire a3to a point d4, thence through wire c to contact-point d, thence tocontact-point c2, these contacts being bridged, as will be presentlyexplained, thence through wire c2 to pushbutton C to wire c1, wire CLS,(see Fig. 1,) magnet F1, wire a9, wire d10, thence (referring again tothe diagram Fig. 2,) through contact device E, which ends the circuit atthat point in case the door B is open. If the door B is closed, thecircuit continues from contact device E through wire d10 to contactdevice E and in case the door B is closed on through wire d10 throughthe safety-switch B3 on the car. Thence the circuit d10 continuesthrough contact device E2 in case the door B2 is closed and on throughwire 0,11 (see Fig. 1) to the wall-switch W and to the main returnwireb2. It' desired, a lamp or other suitable device (indicated at B1) maybe arranged in this circuit to reduce the current flowing therethrough.It will be noted that the current as above traced leads through all thecontact devices E E E2 throughout the system and also through thesafety-switch B3 on the car. In Fig. 1l I have shown a constructionsuitable for the car-switch B2, wherein the circuit through wire 61,10is completed between the contact-springs c25 by a conducting-plug @26,carried by a pin w27 and held by a spring 0.22 in normal engagement withthe contactsprings c25. The circuit is broken by means of thepush-button @29, through which the plug C026 may be moved out of contactwith the springs c25. In Fig. l2 I have shown a simple and convenientform of door-switch, and as the construction of all the switches isidentical a description of door-switch E will be sufficient. The circuitthrough wire d10 is completed between the contact-levers 01,20 by meansof a contact-plug @31, carried by the door B, the levers beingyieldingly held in proper position by means of the springs 0,22, thearrangement being such that when the door is in closed position the plug@21 enters the space between the contact-levers d20 and completes thecircuit therethrough, and when the door is moved to open position theplug ct31is withdrawn from between the levers d20 and the circuittherethrough is broken. rIherefore if any door of the system be open orif the safety-switch on the car be open no current can flow through thiscircuit. Commencing at point a4 a shunt-circuit is established therefromthrough wire a5, post d6, lever F5, point F7, wire d20 to the post a6 ofmagnet-switch F through its lever F5, contact F7, wire @L21 to post c6of magnet-switch F2, its lever F5 to post F1. The purpose and functionof this sh unt-circuit will be explained more fully hereinafter. Thepoints c c2 are bridged by means of an auxiliary switch when the mainswitch device G2 is open. (See Fig. 6.)

From the foregoing it will be seen that pushing the button C will closea circuit, including magnet F4, of magnet-switch F, thereby effecting anenergization of said magnet.

Now suppose instead of pushing button C the button D on the car ispushed. Thereupon the following circuit is established: from main orwall switch W to wire c3, Figs. l and 2, as above described,wire c5,Fig. 2, push-button D, wire c6, wire c4, and thence on, as abovedescribed, through wire a8, Fig. l, magnet F4, wire d10, through all thedoor-switches E E' E2, the safety-switch B3 on the car, wire 1,11 to themain return-wire b2. Thus it will be seen that whether push-button C atthe landing is manipulated or the push-button Don the car correspondingthereto the magnetswitch F will be actuated. Similarly suppose thepush-button O2 to be manipulated.I Thereupon the following circuit willbe closed:

from main wall-switch W, Fig. l, as above explained, to wire c2, (seeFig. 2,) through push-button C2, wire c7, wire 08, magnet F11, wire c2,wire d10, and on, as before, through the door-switches E E E2, thesafety-car switch B2, and return through wire w11 to wall-switch W'. Ifinstead of push-button C2 suppose the corresponding push-button D2 onthe car to be manipulated, thereupon the following circuit will beestablished: from the wallswitch to wire c3, wire c5 push-button D2 onthe car, Wire 010 to wire c', and thence on, as before described,through wire es, magnet F11 to wire d10, and thence after passingthrough the door-switch and the safety-switch on the car to the mainreturn-wire b2, as before described. In the same manner the circuitscontrolled by any other floor or landing pushbutton or its correspondingcar-button can be traced, and it will be found that when anyfloor-button or its corresponding car-button is manipulated a circuit iscompleted which includes the corresponding magnet-switch F F F2.

The energization of magnet F1 causes the armature-lever F5 to rock intocontact with point FG, thereby completing the shunt-circuit from thewall-switch, and which includes wire a5, to said point F6 through wire dto contact-point d. Similarly the Vrocking of the armature-lever F5 ofany other magnetswitch closes a circuit to one or the other of thecontact-points d2 d2, as the case may be, the contact-points FG beingrespectively connected to said contacts d2 cl3 through wires d4 d5. Thuswhenever any one of the tloor or landing push-buttons or thecorresponding car push-button is manipulated the correspondingmagnet-switch F F F2 is actuated to complete a circuit to one or theother of the contact-points d', d2, or d2. rlhe contactpoints d d2 d2are cooperatively arranged to be placed in communication with thecontacts a a b b'. in Fig. tis shown aconstruction for completing thecommunication between contact d and strip b. It will be observed that asmany points d d2 cl3 and levers K8 are employed as there are floors orlandings for the car. One set of contact-strips a a or b b are employedfor the up movement of the car and the other set are employed for thedown movement of the car.

I will now trace the circuit` from point d', reference being had toFigs. 1 and 4t, it being understood that a similar arrangement isemployed in connection with each of the other contacts d2 d2. Supposingthe lever K8 is in position to contact with strip b, then the circuit iscompleted from point d', through point K2, strip Z), wire 7i, point h',wire h2, electric-switch device J 4, wire h2, the coils of solenoid H,wire e3, wire c1 to the wall-switch W. The completion of this circuitenergizes the solenoid H, and hence causes the closing of mainmotor-switch G and also the switch G2. The closing of these switchescompletes ythe circuit through the motor-field, also a circuit whichincludes the auxiliary shunt iieldwindings, and also the motorarmature-circuits. These various circuits will now be traced. From theWall-switch W, through wire a2, point a1, switch-arm f, wire e5 torheostat-arm J7. At this point the current divides, one part passingthrough wire e, so-

lenoid J2, wire e1, points es and e9, these points being bridged. by theactuation of the automatic switch J1, to wire @10, arm f of switch G2,and wire e11 to the wall-switch W. Another portion of the current passesthrough arm J7, rheostat J6, wire @12, the fieldwindings @12, wire @11,brake-solenoid J2, wire @15 to arm f', and thence to the wall-switch W,and the third portion passes from arm J7, rheostat J5, wire 616, pointg, Wire g, point g2, arm f2, wire g3, commutator J2, armature J, wireg4, point g5, wire Q6, point g1, arm f2, point g8, wire g2,field-Winding g10, wire Q11, eld-Winding g12 to Wire e, solenoid J2, andthence onto the wall-switch W, as before eX- plained. The completion ofthese circuits starts up the motor and moves the car in the desireddirection. The energization of the solenoid J2 by the completion of thecircuit therethrough, as above explained, causes arm J7 to rock againstthe action of spring J1?, thereby causing said arm to move over therheostats J5 J6. The result of this is to gradually increase the currentpassing through the motor-armature and to correspondingly decrease thecurrent passing through the field, thus attaining an increasing speed oftravel of the car. The starting up of the motor also sets in rotationthe insulation-disk K6, carrying the contact-segments Ct a b b', and ina direction corresponding to the direction of travel of the car asdetermined by the position of the car when the push-button isinanipulated. The rotative movement of this disk causes thecontact-point d to be eventually brought into contact with strip b. Thisoccurs when the car approaches the landing at which itis to stop. Whenthis contact is made, the circuit through strip b, wire h, and on, asabove described, is broken and the following circuit is completed: frompoint d to strip b', wire @,point c',wire c2,solenoid H,and on to thewall-switch, as above described. The completion of this circuit and thebreaking of circuit between point d and strip b cuts the switch J4 outof circuit, thereby breaking the circuit of solenoid J, thereby causingthe rheostat-arm J7 to return to its normal or retracted position, whichmovement of said arm controlling the rheostats J5 JG decreases thearmature-current and increases the field-current, thereby slowing downthe car, and when the car arrives at the desired landing orstopping-point the projection K10 of lever K8 corresponding to suchfloor will attain that point of the periphery of cam-disk K7 at which islocated the recess K11 and the said projection will drop into saidrecess, thereby breaking the circuit between point d and the strip orsegment b', thereby causing the motorswitches G G2 to return to theirnormal positions,thereby breaking the motor-circuits and arresting themotor.

It will be understood that the recess K11 in the periphery of cam-diskK7 arrives opposite any one of the levers K8 when the car is oppositethe corresponding floor and that said recess is so relatively arrangedthat when the projection K10 of one lever drops into said recess-thatis, when the car is at one stoppingplace-the other levers K2 are held upto cause their contact-points K9 to contact with their cooperatingsegments or strips a a' l) b, as the case may be, so that the apparatusis in condition to be again set in motion when another push-button atsome other floor or a corresponding button on the car is manipulated. Itwill be observed, however. that only two switch-actuating solenoids H Hare employed, one eecting an actuation of switches G and G2 and theother eiecting an actuation of switches G' and G2, the switch G2 beingactuated coincidently with the actuation oteither switches G or G.

Now suppose the push-button C2 or its cor responding car-button D2 to bemanipulated. The corresponding magnet-switch F2 will be thereby causedto operate as above explained, thus completing the circuit of solenoid Hwhen the relative position of contact device K is that shown in thedrawings, and hence actuating switches G G2. The actuation ot` theseswitches eects a reversal of the current through the motor-armature,thereby causing the car to move in the opposite direction to that abovedescribed. In other respects the operation is the same as that abovedescribed, the car starting up and having its speed accelerated until itapproaches the particular predetermined landing at which it is to stop,and then the motor is automatically slowed down and the motor-circuit isfinally broken when the car reaches its stoppingpoint.

It is above explained that when neither of the switches G G is snappedin-that is, when they arein their normal retracted position--anauxiliary switch actuated thereby operates to close the circuit betweenpoints c c2, which are included in the circuit of all the landingpush-buttons throughout the system. Vhen,however, either ot the switchesG G is actuated, thereby in either case, as explained, actuating switchG2, this circuit is broken between the points c c2, (see Fig. 6,) and asthe circuits of the various magnetswitches are completed through thesepoints by breaking this circuit between points c' c2 the particularmagnet-switch which is actuated by pushing a button would be broken,thereby breaking the circuit which controls the motor-switch actuatingsolenoids H H. To avoid this, I arrange another circuit adapted to beclosed through contact-points c and 7c when the switch G2 is actuated bymeans of said auxiliary switch. This completes the following circuit:from main wallswitch W through wire a5, point a4, wire c, point c, pointk, wire k, post F2, and since under the previous conditions, as aboveeX- plained, the magnet-switch has been actuated bythe manipulation of apush-button the lever F5 has been rocked to cause point m, which isinsulated from lever F5, to contact with said post F8, and hence saidauxiliary circuit is completed from said lever through wire a7, Wire a5,and on through magnet F4, as above explained. The several posts F8 arein electrical connection with each other, and hence whichevermagnet-switch has been operated will remain in the operative relation inwhich it is put when a push-button has been manipulated, notwithstandingthe fact that the push-button circuits have been broken and all thepush-buttons are inoperative. The practical and advantageous eect ofthis arrangement is to prevent any action taking place when any otherpush-button is manipulated while the car is in motion through themanipulation of a particular button.

From the foregoing description it will be seen that a push-button isarranged at each landing and a push-button is arranged on the car tocorrespond to each floor. Each [ioor push-button and its correspondingcarbutton controls a circuit which includes a magnet-switch. Eachmagnet-switch controls a circuit which includes one or the other of twosolenoids. Each solenoid-circuit includes a contact-making arrangementadapted to be broken automatically when the car has reached theparticular fioor corresponding to the button which has been manipulatedand also adapted to automatically eftect a slowing down of the motor asthe car approaches the landing at which it is to stop. Each solenoidactuates sets of switches through which the motor-circuits arecontrolled. It will also be seen that the pushbutton circuits are allinoperative if any shaft or well-door is open and that all thepush-buttons are inoperative when the car is in motion. y

I have referred to the fact that both sets of switches G G cannot beactuated at the same time. It will be observed that two solenoids H Ilare employed for actuating these switches, the solenoid H actuatingswitch G and the solenoid H actuating switch G. Now in order that bothswitches G G' may not be actuated at the same time I provide meanswhereby-it is impossible to simultaneously energize the coils of bothsolenoids H H. This is the special function and purpose of theshunt-circuit which includes wire a5. By tracing this circuit it will beseen to extend to post a6, lever F5, point F7, wire d20, post a5 ofmagnet-switch F, its lever F5, point F7, wire e121, post a5 ofmagnet-switch F2, its lever F5, point FT-that is, supposing that all themagnet-switches are inoperative or out of action. Now the circuits forenergizing the solenoids H H' are completed by actuating a magnet-switchso that a lever F5 may contact with point F5, the several points F6being wired to points d d2 d5, as shown. Now suppose magnet-switch F tobe actuated, thereby rocking lever F5, to complete a solenoid-circuit tod', the rocking of said lever effects a break in the circuit abovetraced, which includes point F7 and the le- IOO IIO

vers F5 of the other magnet-switches. Therefore only that solenoid H orI-I which is fed or energized through the circuit which includes pointCZ will be energized, all the other solenoid-circuits beingautomatically cut out or broken by the actuation of one motor-magnetlever'.

From the foregoing description it will be seen that I provide a simpleand efficient pushbutton system for controlling the movements of the caras to destination from any landing or from the car.

I do not desire to include herein claims of sufficient scope to covermechanical devices or appliances for controlling the speed of eugines,as my invention resides in an electrical hoisting mechanism withelectrical devices for controllingT the direction and speed thereof; nordo I claim specifically a hand-controlled cut-out switch in themotor-circuit with mechanism connected thereto and operated by themovement of the motor for automatically breaking the main circuit; nordo I claim specifically the use of push-buttons at each floor forelfecting the electrical control of the car-hoisting` mechanism; nor doI claim, broadly, the idea of rendering inoperative, when the motor isin operation, the electrically-controlled means which set the motor inoperation.

Having now set forth the object and nature of my invention and aconstruction embodying the .principles thereof, what I claim as new anduseful and of my own invention, and desire to secure by Letters Patent,is-

l. In an electric elevator, a hoisting-motor, circuits for said motor,an electrically-operated main switch, means for controlling the sameincluding a series of push-buttons, one arranged at each floor orlanding, and a corresponding series of push-buttons arranged on the carand each push-button adapted to close the circuit of said switchoperating means, and an auxiliary switch actuated coincidently with themain switch for breaking all the push-button circuits as themotor-circuit is completed, as and for the purpose set forth.

2. In an electric elevator, a hoisting-motor, circuits therefor, anelectrically operated main switch, means for controlling the sameincluding a series of push-buttons, one arranged at each Hoor orlanding, a corresponding series of push-buttons arranged on the car,each push-button adapted to close the circuit of said switch-operatingmeans, and circuit-closure devices also arranged in said circuit andadapted to be opened and closed by the opening and closing of theelevatorshaft or well-door, and an auxiliary switch actuatedcoincidently with the main switch to break the push-button circuit aslong as the motor-circuit remains closed, as and for the purpose setforth.

3. In an electric elevator, a hoisting-motor, circuits therefor, meansfor controlling said circuits, a magnet-switch for controlling saidcircuit-controlling means, a push-button arranged on the car forcontrolling the circuit of said magnet-switch, an auxiliary switchactuated coincidently with the actuation of said circuit-controllingmeans for breaking said push-button circuit, and an auxiliaryenergizing-circuit forsaid magnet-switch, and means for closing saidauxiliary circuit coincidently with the breaking of the push-buttoncircuit, as and for the purpose set forth.

4. In an electric elevator, a hoisting-motor, circuits therefor,switches for controlling said circuits, electrical devices for actuatingsaid switches, a series of vpush-buttons, one arranged at each door orlanding and each adapted to close the circuit of said electricaldevices, an auxiliary switch arranged in the push-button circuits, andconnections between said auxiliary switch and said main switch wherebywhen the latter is operated said auxiliary switch is opened to break thepush-button circuits, as and for the purpose set forth.

5. In an electric elevator, a hoisting-motor, circuits therefor, meansfor controlling said circuits, a series of magnet-switches correspondingin number to the various landings at which the car is to stop, and eachadapted when actuated to operate said circuit-controlling means, and apush-button arranged at each landing for controlling the circuit of itscorresponding magnet-switch, an auxiliary switch arranged in thepush-button circuit, connections between the motor-circuitcontrollingmeans and said auxiliary switch, whereby the actuation of the formeropens the latter, and an auxiliary energizing-circuit for saidmagnet-switches arranged to be closed when the push-button circuit isopened, as and for the purpose set forth.

6. In an electric elevator, a hoisting-motor, circuits therefor, aseries of magnet-switches corresponding to the various landings at whichthe car is to stop, and each adapted when actuated to effect the controlof the hoisting-motor circuits, a main circuit and an auxiliary circuitfor said magnet-switch, a switch for controlling said auxiliary circuit,means for closing said auxiliary-circuit switch when said main circuitis broken, and a push-button arranged at each landing for controllingthe main circuit of its corresponding magnet-switch, as and for thepurpose set forth.

7. In an electric elevator, a hoisting-motor, circuits therefor, aseries of magnet-switches corresponding to the various landings at whichthe car is to stop, each adapted when actuated to effect the control ofthe hoistingmotor circuits, a main circuit and an auxiliary circuit foreach magnet-switch, a switch for controlling said auxiliary circuits,means for closing said switch when said main circuit is broken, and aseries of push-buttons on the car corresponding to the Various mag- IOOIIO

net-switches for controlling the main circuits of said magnet-switches,as and for the purpose set forth. Y

8. In an electric elevator, a hoisting-motor, a series ofmagnet-switches, correspondingto the various landings at which the caris to stop, each adapted when actuated to effect the control of thehoisting-motor circuits, a main and an auxiliary circuit for eachmagnet-switch, means for closing the auxiliary circuit when the maincircuit is open, each main circuit includingl a push-button at thelanding corresponding to said magnet-switch, and an auxiliaryenergizing-circuit for said magnet-switch, and means for closing saidauxiliary circuit, as and for the purpose set forth.

9. In an electric elevator, a hoisting-motor, a series ofmagnet-switches, corresponding to the various landings at which the caris to stop, and each adapted when actuated to effect the control of thehoisting-motor circuits, a main and an auxiliary circuit for eacnmagnet-switch, each of said main circuits including a push-buttonarranged at the landing corresponding to its own magnet-switch, and aclosure device arranged in said main magnet-switch circuits at eachlanding, to be controlled by the opening and closing of theelevatorshaft or welldoor, electrically controlled means for renderingall the push-button circuits inoperative while the motor-circuits areclosed, an auxiliary energizing-circuit for said magnet-switches, andmeans for closing said auxiliary circuit, as and for the purpose setforth.

10. In an electric elevator, a hoisting-motor, a series ofmagnet-switches, corresponding to the various landings at which the caris to stop, and each adapted when actuated to effect the control of thehoisting-motor circuit-s, a main and an auxiliary circuit for eachmagnet-switch, each main circuit including a push-button on the car anda push-button at the particular landing corresponding to saidmagnet-switch, and an auxiliary energizingcircuit for saidmagnet-switch, and means for closing said auxiliary circuit, as and forthe purpose set forth.

11. In an electric elevator, a hoisting-motor, a magnet-switch foreffecting the control of the circuit of said motor, a main and anauxiliary circuit for said magnet-switch, the main circuit including apush-button, and means actuated coincidently with the actuation of themotor for breaking said push-button circuit, and an auxiliaryenergizing-circuit for said magnet-switch, and means for closing saidauxiliary circuit, as and for the purpose set forth.

12. In an electric elevator, a hoisting-motor, a switch for controllingthe circuits of said motor, electrical devices for actuating saidswitch, means arranged at each landing for completing the circuit ofsaid electrical devices, and an auxiliary switch actuated by theoperation of said switch for breaking said landing-circuits, as and forthe purpose set forth.

13. In an electric elevator, a hoistingmotor, a switch for controllingthe circuits of said motor, electrical devices for actuating saidswitch, magnet-switches for controlling the circuits of said electricaldevices, said magnet-switches corresponding in number to the variouslandings at which the car is to stop, a main circuit and an auxiliarycircuit, means whereby when said main circuit is opened the auxiliarycircuit is closed, and a push-button arrangedat each landing forcompleting the main circuit of its corresponding magnetswitch, andelectrically-controlled means for rendering all the push-button circuitsinoperative while the car is in motion, as and for the purpose setforth.

14. In an electric elevator, a hoisting-motor, a switch for controllingthe circuits of said motor, electrical devices for actuating saidswitch, magnet switches corresponding in number to the various landingsat which the car is to stop, for controlling the circuits of saidelectrical devices,a push-button arranged at each landing, forcompleting the circuit of its corresponding magnet-switch, and meansactuated by said motor-switch for breaking said push-button circuits,coincidently 'with the completion of the motor-circuit, as and for thepurpose set forth.

l5. In an electric elevator, a hoisting-motor, a switch for controllingthe circuits of said motor, electrical devices for actuating saidswitch, a magnetswitch, corresponding to each landing at which the caris to stop, for controlling the circuit of said electrical devices, acircuit for each magnet-switch, each magnet-switch circuit including apush-button on the car and a push-button at the licor or landingcorresponding to said magnetswitch, and an auxiliary switch actuated bysaid motor-switch for making or breaking all of said push buttoncircuits, coincidently with the breaking or making, respectively, of themotor-circuit, as and for the purpose set forth.

16. In an electric elevator, ahoisting-motor, a switch for controllingthe circuits of said motor, electrical devices for actuating saidswitch, a series of magnet-switches, a main circuit thereforcontrollable from the respective landings at which the car is to stop,for controlling the circuits of said electrical devices, and anauxiliary energizing-circuit for said magnet-switch, and means forclosing said auxiliary circuit, and means arranged in the circuits ofsaid electrical devices for automatically breaking said circuits whenthe car arrives at the door or landing corresponding to themagnet-switch which is operated, as and for the purpose set forth.

17. In an electric elevator, ahoisting-motor, a switch for controllingthe circuits of said motor, electrical devices for actuating saidswitch, circuits for said electrical devices, magnet-switchescontrollable from the respec- IOC) IIO

tive landings at which the car is to stop, for completing the circuitsof said electrical devices, and an auxiliary energizing-circuit for saidmagnet-switch, and means for closing said auxiliary circuit, means foropening said landing-circuits when said auxiliary circuit is closed, andmeans arranged iu the circuits of said electrical devices and actuatedby the hoisting-motor for automatically breaking said circuits when thecar arrives at the particular landing at which it is to stop, as and forthe purpose set forth.

18'.' In an electric elevator, a hoisting-motor, a switch forcontrolling said motor, electrical devices for actuating said switch,circuits for said electrical devices including au automatic contactdevice, magnet-switches, main circuits therefor controllable from therespective floors or landings at which the car is to stop for completingthe circuit of said electrical devices to said automatic contact device,and an auxiliary energizing-circuit for said magnet-switch, and meansfor closing said auxiliary circuit, and means actuated by said motor foroperating said contact device, as and for the purpose set forth.

19. In an electric elevator, a hoisting-motor, and means for controllingsaid motor, including a series of magnet-switches corresponding to thevarious landings at which the car is to stop, each adapted to becontrolled from its corresponding landing, and means whereby when onemagnet-switch is actuated the landingcontrolling circuits of all themagnetswitches are broken, and an auxiliary energizing-circuit forsaidmagnet-switches adapted to be closed when said landing-circuits arebroken, as and for the purpose setY forth.

20. In an electric elevator, a hoisting-xnotor, and means forcontrolling said motor, including aseries of magnet-switches, a maincircuit for each magnet-switch, each of said main circuits including apush-button on the car and a push-button at the corresponding landing,means whereby when one magnet-switch is operated the main or push-buttoncircuits of all the magnet-switches are broken until the cycle ofoperation set in motion by that magnet-switch which has been operated iscompleted, an auxiliary energizing-circuit for said magnet-switches, acontrolling-switch for said auxiliary circuit, and means for closingsaid auxiliary-circuit switch when said pushbutton circuits are broken,as and for the purpose set forth.

2l. In an electric elevator, a hoisting-motor, means for controlling thecircuits of said motor, includingra series of magnet-switches, a circuitfor each magnet-switch, each circuit including a push-button on the carand a push-button at the corresponding landing at which the car is tostop, an auxiliary energizing-circuit for said magnet-switches, andmeans actuated coincidently with the completion of the motor-circ uitfor breaking said push-button circuit and completing said auxiliaryenergizing-circuit, as and for the pose set forth.

22. In an electric elevator, a hoisting-motor, a switch for completingthe circuit of said motor, an auxiliary switch actuated by saidmotor-switch, means for controlling said motorswitch, including a seriesof magnet-switches corresponding to the yarious landings at which thecar is to stop, a circuit for each magnet-switch, including apush-button on the car and a push-button at the corresponding landing,an auxiliary energizing-circuit for said magnet switches, said auxiliaryswitch adapted to control the push-button and auxiliary circuits of saidmagnet-switches, as and for the purpose set forth.

23. In an electric elevator, a hoisting-motor, means for controlling thecircuits of said motor, including a series of magnet-switches, a circuitfor each magnet-switch, each circuit including a push-button, anauxiliary energizing-circuit for said magnet-switches, said auxiliaryenergizing-circuit including a closure device at each landing, adaptedt0 be opened and closed by the opening and closing of the shaft or welldoorat that landing, and means actuated coincidently with the completionof the motor-circuit, for breaking said push-button circuit andcompleting said auxiliary energizing-circuit, as and for the purpose setforth.

24. In an electric elevator, a hoisting-motor, a circuit therefor,make-and-break and direction-controlling switches for said circuit, saidmake-and-break switch adapted to be actuated when any one of thedirection-controlling switches is actuated, and electrical means forcontrolling said switches from any landing or from the car, saidelectrical means having a main circuit extending to the carand to eachlanding, and an auxiliary circuit, and means whereby when the former isopened the latter is closed, as and for the purpose set forth.

25. In an electric elevator,a hoisting-motor, a circuit therefor, amake-and-break and direction-controlling switches for said circuit, saidmake-and-break switch adapted to be actuated when any one ofthedirection-controlling switches is actuated, electrical devices forcontrolling said switches, main and auxiliary circuits for saidelectrical devices, said main circuit-s including a push-button on thecar and a push-button at each iioor or landing, and means for breakingthe pushbutton circuits when the make-and-break switch is closed, as andfor the purpose set forth.

26. In an electric elevator,a hoisting-motor, a circuit therefor, amake-and-break and direction-controlling switches for said circuit,means whereby when either one of said direction-controlling switches isactuated said make-and-break switch is also actuated, a solenoid foractuating each direction-controlling switch, a circuit for eachsolenoid,

pur-

Izl

and electrical means, main and auxiliary circuits therefor, the formerincluding pushbuttons arranged at each landing, for controlling thecircuits of said solenoids, and means for breaking the circuit of saidelectric means when the make-and-break switch is closed, as and for thepurpose set forth.

27. In an electric elevator, a hoisting-motor, a circuit therefor, amake-aud-break and direction-controlling switches for said circuit, asolenoid for operating each direction-controlling switch, and meanswhereby the completion of the circuit of one solenoid prevents thecompletion of the circuit of the other solenoid, as and for the purposeset forth.

28. In an electric elevator, a hoisting-motor, a circuit therefor, amake-andbreak and two sets of direction-controlling switches for saidcircuit, a solenoid for operating each set of direction-controllingswitches, electrical means for controlling the circuits of saidsolenoids from each landing or from the car, and means for breaking thecircuit of said electrical means when the make-and-break switch isclosed, as and for the purpose set forth.

29. In an electric elevator, a hoisting-motor, a circuit therefor, amake-and-break and independent direction-controlling switches, asolenoid for operating each direction-controlling switch, circuits forsaid solenoids, controlling devices for said circuits, including amagnet switch, a circuit for said magnetswitch, said circuit including apush-button, and an auxiliary energizing-circuit for said magnet-switch,and means for closing said auxiliary circuit, as and for the purpose setforth.

30. In an electric elevator, a hoisting-motor, a circuit therefor, amake-andbreak and independent sets of direction controlling switches forsaid circuit, a solenoid for operating each set of direction-controllingswitches, means for controlling said solenoids, including a series ofmagnet-switches corresponding to the various landings at which the caris to stop, and a push-button arranged at each landing for controllingthe corresponding magnet-switch, and an auxiliary energizingcircuit forsaid magnet-switch, and means for closing said auxiliary circuit, as andfor the purpose set forth.

3l. In an electric elevator, a hoisting-motor, circuits therefor, aseries of magnet-switches, a main and an auxiliary circuit for each ofsaid magnet-switches, a switch for said auxiliary circuits, means forclosing said switch when said main circuits are broken, a pushbuttonarranged at each landing and corresponding push-buttons on the car, eachpushbutton adapted to control the main circuit of a magnet-switch,electrically-controlled means for rendering all the push-button circuitsinoperative while the car is in motion, circuits controlled by saidmagnet-switches, means arranged in said circuits for controlling themotor-circuits, and means also arranged in said circuits for causing thearrest of the motor when the car reaches any predetermined landing, asand for the purpose set forth.

32. In an electric elevator, a hoisting-motor, a series ofmagnet-switches, main and auxiliary circuits for said switches, apush-button arranged at each landing, and a corresponding push-buttonarranged on the car, each push-button adapted when manipulated to closethe main circuit of a magnet-switch, circuits controlled by saidmagnet-switches, means arranged in said circuits for controlling themain motor-circuits, and means also arranged in said circuits forcausing the motor to slow down as the car approaches any predeterminedfloor, as and for the purpose set forth.

33. In an electric elevator, ahoisting-motor, a series ofmagnet-switches, main and auxiliary circuits for said magnet-switches, apushbutton arranged at each landing and a corresponding push-buttonarranged on the car, each push-button adapted when manipulated to closethe main circuit of a'magnet-switch, and electrically-controlled meansfor rendering all the push-button circuits inoperative while the car isin motion, circuits controlled by said magnet-switches, means arrangedin said circuits for controlling the main motorcircuits, and means alsoarranged in said circuits and operated by the motor for automaticallybreaking said circuits when the car reaches a particular predeterminedlanding, as and for the purpose set forth.

Set. In an electric elevator, a hoisting-motor,

a series of magnet-switches, main and auxiliary circuits for saidmagnet-switches, a pushbutton arranged at each landing, and acorresponding push-button arranged on the car, each push-button adaptedwhen manipulated to close the main circuit of a magnet-switch, andelectrically-controlled means for rendering all the push-button circuitsinoperative while the car is in motion, a control-circuit adapted to beclosed when a magnet-switch is operated, an automatic switch arranged insaid control-circuit, and devices controlled by said control-circuit forvarying the speed of the motor, as and for the purpose set forth.

35. In an electric elevator, a hoisting-motor, circuits therefor, a mainswitch for controlling said circuits, a rheostat for varying the speedof said motor, devices for actuating said rheostat, a circuit for saiddevices, means actuated by the motor for breaking said circuit inadvance of the breaking of the main switch as the car approaches anyparticular predetermined tloor, and a push-button arranged at each iioorfor controlling the motor-circuit, as and for the purpose set forth.

36. In an electric elevator, a hoisting-motor, a rheostat for varyingthe speed of said motor, a solenoid for actuating said rheostat, anautomatic switch for controlling the circuit of said solenoid, a circuitfor said automatic switch, and means actuated by the motor for breakingthe circuit of said automatic switch IOO IIO

ILO

as the car approaches a particular predetermined landing, as and for thepurpose set forth.

37. In an electric elevator, ahoisting-motor, a rheostat for varying thespeed of said motor, a solenoid for actuating said rheostat, anautomatic switch for controlling the circuit of said solenoid, a contactdevice arranged in the circuit of said automatic switch for making andbreaking said circuit, and means controllable from the car and from eachfloor or landing for completing said circuit to said contact device, asand for the purpose set forth.

38. In an electric elevator, a hoisting-motor, a rheostat for varyingthe speed of the motor, an automatic switch for controlling saidrheostat, a contact device arranged in the circuit of said automaticswitch, and actuated by the motor, for making and breaking said circuit,and means controllable from the car and from each landing for completingsaid circuit to said contact device, as and for the purpose set forth.

39. In an electric elevator, a hoisting-motor, a rheostat for varyingthe speed of the motor, an automatic switch for controlling saidrheostat, a contact device arranged in the circuit of said automaticswitch, and actuated by the motor, for making and breaking said circuit,a series of magnet-switches, each when actuated adapted to complete anoperating-circuit to said contact device, and means controllable fromthe car and from each landing for actuating said magnet-switches, as andfor the purpose set forth.

40. In an electric elevator, a hoisting-motor, a rheostat for varyingthe speed of the motor, an automatic switch for controlling saidrheostat, a contact device arranged in the circuit of said automaticswitch, and actuated by the motor, for making and breaking said circuit,a series of magnet-switches corresponding to the various landings atwhich the car is to stop, each when actuated adapted to close anoperating-circuit to said contact device, a circuit for eachmagnet-switch, a push-button on the car, and a push-button at thecorresponding landing, for'completing said motormagnet circuits, as andfor the purpose set forth.

41. In an electric elevator, a hoisting-motor, a field-circuit, and anarmature-circuit therefor, a rheostat for varying the current in saidcircuits, an automatic switch for controlling the circuit of saidrheostat, a contact device actuated by the motor for making and breakingthe circuit of said automatic switch,where by as the motor starts up itsspeed is accelerated, and as the car approaches its predeterminedstopping-point its speed is decreased, and means controllable from thevarious landings for completing circuit to said contact device, as andfor the purpose set forth.

42. In an electric elevator, a hoisting-motor, a switch device forcontrolling the circuits of said motor, electrical devices for actuatingsaid switch device, a contact device arranged in the circuit of saidelectrical devices and adapted to be actuated by the motor to make andbreak said circuit, a series of magnetswitches, each adapted to close acircuit to said contact device, a main circuit for each magnet-switch,-each magnet-switch main circuit including a push-button on the car and apush-button at a floor or landing at which the car is to stop, and anauxiliary energizingcircuit for said magnet-switches, and means wherebywhen the push-button circuit is broken said auxiliary circuit is closed,as' and for the purpose set forth.

43. In an apparatus for controlling elevators, the combination with amotor for operating the car in veither direction, of a iioorcontroller,push-buttons controlling the lioorcontroller, and means controlled bythe floorcontroller for reducing the speed ofthe motor before it isstopped.

44. The combination of an elevator and a motor therefor, of a mechanismincluding a rotary disk driven in unison with the motor, and lever, armsby which the electrical circuit of the motor is kept closed by the armscontacting with the disk, said circuit controlled by said mechanism toarrest the motor and cage when the latter has reached its destination.

45. The combination with an electric elevator or hoist, of mechanismactuated by the movement of the hoist, and arranged to automatically cutin resistance so as to slow down the motor as the car or hoist nears theend of its travel.

46. In an electric hoist, a series of resistances in the motor-circuit,a contact movable over the resistances, and actuating connectionsbetween the contact and the hoistingdrum, arranged to move the contactover the resistances and to cut in resistance as the car or hoist nearsthe end of its travel.

47. In an electric hoist, a reversing-coniroller and a cut-out switchincluded in the circuit, and a mechanism connected with the cut-outswitch operated by the movement of the hoist and arranged toautomatically break. the main circuit when the car has reached the limitof its travel.

4S. In a hoisting mechanism, the combination of a car, mechanism formoving said car, means for stopping said car at any predeterminedintermediate landing in its travel, and automatic means for changing therate of movement of the car as it approaches its predeterminedstopping-point, as and for the purpose set forth.

49. In a hoisting mechanism, the combination of a car, mechanism formoving said car, means for automatically stopping the car at anypredetermined landing or floor, and means for reducing the rate ofmovement of the car as it approachesv the predetermined landing or oorat which it is to stop, as and for the purpose set forth.

50. In a hoisting mechanism, the combination of a car, mechanism formoving said car,

IOO

IIO

automatic means for changing the rate of movement of the car from fastto slow as it approaches certain predetermined landingpoints, and meansfor automatically stopping the car when it arrives at the predeterminedstopping-point, as and for the purpose set forth.

5l. In a hoisting mechanism, the combination of a car, mechanism formoving the same, and automatic means for changing the rate of movementof the car from fast to slow as it approaches certain predeterminedlanding or stopping points, as and for the purpose set forth.

52. The combination with a car, an electric hoisting motor and a circuittherefor, of mechanism geared to and actuated by said motor forautomatically cutting in resistance in the motor-circuit to slow downthe motor as the car approaches any predetermined landing or stoppingpoint, as and for the purpose set forth.

53. In a hoisting apparatus, the combination with an electric motor foroperating the carin either direction, of a switch device operating tocontrol the motor-circuits and also the particular floor or landing atwhich the car is to stop, and means for controlling said HAROLD ROWNTREE.

Witnesses: f

FRANK T. BROWN, S. E. DARBY.

